O'Connell's surprisingly beautiful exposé of morality focuses on Malcom Macarthur, who brutally murdered two people in 1980s Ireland, yet was released in 2012 for good behavior. Roaming the Dublin streets with an apparently clear conscience and referring to his crimes as an "episode," this aristocratic killer Intrigued and perplexed O'Connell--to the point where the writer befriends him and struggles to peel back the layers of his strange obsession, grappling with both the bizarre relationship he's formed with Macarthur and the infuriating details the killer chooses to disclose.